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Diabetes Care, Vol 21, Issue 12 2062-2068, Copyright © 1998 by American Diabetes Association
Use of services by diabetes patients in managed care organizations. Development of a diabetes surveillance system. CDC Diabetes in Managed Care Work Group
MM Engelgau, LS Geiss, DL Manninen, CE Orians, EH Wagner, NM Friedman, JS Hurley, KM Trinkaus, D Shatin and KA Van Vorst
Division of Diabetes Translation, Centers for Disease Control and Prevention, Atlanta, GA 30341-3724, USA. mxel@cdc.gov
OBJECTIVE: To develop a diabetes surveillance system that estimates the
prevalence of diabetes and characterizes service use in diverse managed
care organizations (MCOs). RESEARCH DESIGN AND METHODS: Computerized
inpatient, pharmacy, outpatient, and laboratory records were used to
develop an algorithm to identify diabetes patients and to develop
surveillance indicators common to the three participating MCOs. Using 1993
data, the availability, specifications, and limitations of various
surveillance indicators were determined. RESULTS: An extensive set of
diabetes surveillance indicators was identified from the four sources of
data. Consistent data specifications across MCOs needed to consider
variation in the type of data collected, a lack of documentation on level
of coverage, differences in coding data, and different models of health
care delivery. A total of 16,363 diabetes patients were identified. The
age-adjusted prevalence of diabetes ranged from 24 to 29 per 1,000
enrollees. Approximately one-third of patients with diabetes (32-34%) were
taking insulin. The majority had one or more visits to a primary care
physician during the year (72-94%). Visits to specialists were less
frequent. Ophthalmologists and optometrists were the most commonly used
specialists: 29-60% of the patients with diabetes at the three MCOs had
visited an ophthalmologist or optometrist. About one-fifth had an overnight
hospital stay during the year. CONCLUSIONS: This diabetes surveillance
system is a useful tool for MCOs to track trends in prevalence of diabetes,
use of health services, and delivery of preventive care to individuals with
diabetes. This system may also be useful for health care planning and for
assessing use changes after new developments in diabetes care or new
quality management initiatives.

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Copyright © 1998 by the American Diabetes Association.
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